Process for preserving fruit peels and rinds by impregnation with sugar.



. mates t'o-normal A UNITED STATES PATENT. OFFICE. M

GEORGE osBoRN'E PENN,

or AD LAIDE, SOUTH AUSTRALIA, AUSTRALVIDA.

PRoCESS roe PRESERVING' FRUIT FEELS AND RINDS BY IMPREGNATION wrrn were.

1 145 333 Specification of Letters Patent. No Drawing.

To all whom it may concern.

Be it known that I, Gnoncn OSBORNE PENN, subject of the King of Great Britain and Ireland, residing at Flinders street, Adelaide, South Australia, Australia, have invented certain new and useful Improvements in Processes for Preserving Fruit Peels and Rinds by Impregnation with Sugar, of which the following is a specification. f My invention consists in an. improved process for the treatment of fruitv peel and it rind, and it has for its object the preservation of those products and the manufacture of candied peel.

Incarrying out the invention,

juice expressed from the pulp. The juice may however be left in the pulp. The half pieces are pickled in strong brine for a period varying from two' to twelve months whereby a softening of the cellular tissue is effected. After removal from the brine, the pieces are soaked and repeatedly washed in fresh water to remove the brine, and the pulp is separated from the peel or rind. The latter is placed in a closed digester and subjected to steaming under a pressure of about ten pounds per square inch for a period of from ten to thirtyminuteswhereby the tissue is opened and further softened. The peel or rind is now packed on trays and placed in a closed chamber with a thick syrup having a'density of about forty degrees Baum, said syrup completely covering the peel or rind. The syrup isat an initi'al temperature of 100 degrees Fahr. approximately at the commencement of the operation but the temperature falls to normal during the treatment, which is continued for a period of about twelve hours under a pressure varying from 130 to 175 lbs. per square inch. After a lapse of about twelve hours the density of the syrup will have fallen, and it" is then ,run ofl" and a fresh charge of thick syrupJat lOO degrees Fahr. 1s run in: and y the pressure again raised, the temperature being allowed to fall as before so that at the conclusion of the treatment which extends for a second term of twelve hours the temperature approxiatmospheric temperature.

process throughout the citrus or other fruit is halved by cutting and the steamed under: press The peel or rind thus impregnated with the Patented July e, 1915.

Application filed October 21, 1913. Serial-No. 796,484.

syrup is now removed from the closed chamer and submitted to a drying process, after which it is immersed in 'a very heavysyrup and drained ofl. This syrup on'drying assumes a crystalline form producing a candied product.

would have it understood that as the is of a'mechanical nature, it is not obligatory to use the precise temperature or density of solution specified v or to maintain the treatment for the period specified or to use the precise range of degree of pressure specified. he process as described is however the best method known to me for the manufacture of candied peels. The treatment in strong syrup may be repeated oftene'r than twice, but in practice one repetition is found sufficient. at I claim as my invention and desire to secure by Letters Patent is process of manufacturing candied peel wherein the pieces are pickled in strong brine for an extended term,v soaked and. 1" washed in fresh water to remove the brine, steamed under ressure', placed in a closed chamber and su jected, under a high pressure to a plurality ofiimpregnations. of dense syrup, and 'fina'lly desiccated, imnhersed in a very; heavysyrup'and drained 0 Y v 2. A process of manufacturing candied peel whereinthe pieces are pickled in strong brine for an extended term, soaked and washed in fresh' water to remove the brine, ure, placed. in a closed chamber and subjected under ahigh pres sure to an impregnation' of dense 'warr'nv syrup which after cooling is removed, 'further subjected under highpressure to an! other impregnation of dense v warm syrup, 1,

and finally desiccated, immersed a ver'y heavy syrup and drained'ofi'. N j I A process of manufacturin candied peel wherein the piecesare' pickled in strong brine .for an extended term, soaked and washed in fresh waterto remove the brine, steamed under a pressure of approximately ten lbs. per square inch for a period often to thirty minutes, placed in a closed chamher and subjected under a pressure of to lbs. per square inch to an impregnation of syrup having approximately an initial density of 40 degrees Baum and an initial temperature of 100 degrees Fahrenheit for a period of about 12 hburs until the temperature falls to normal, such impregnation being repeated with a fresh sup- 5 ply of syrup, and finally desiccated, 1m-

mersed' in a very heavy syrup an dramed Witnesses:

H. A. W001), HARRY LAYCOOK.

In testirnony wher'eof'I have aflixee my slgnature m presence of twowitnesses.

GEORGE OSBORNE PENN. 

